CN101975050B - Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment - Google Patents
Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment Download PDFInfo
- Publication number
- CN101975050B CN101975050B CN 201010286268 CN201010286268A CN101975050B CN 101975050 B CN101975050 B CN 101975050B CN 201010286268 CN201010286268 CN 201010286268 CN 201010286268 A CN201010286268 A CN 201010286268A CN 101975050 B CN101975050 B CN 101975050B
- Authority
- CN
- China
- Prior art keywords
- layer
- well
- cave
- communicated
- destination layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The embodiment of the invention discloses a construction method of a coal bed gas horizontal well and a vertical drainage well in multi-objective layer geologic environment, comprising the following steps of: drilling a vertical drainage well; when a sleeve pipe is inserted, inserting glass steel sleeve pipes to a corresponding position of each objective layer in the vertical drainage well, wherein other positions are provided with steel sleeve pipes; in the vertical drainage well, sequentially reaming each objective layer to form a cave from the objective layer of a bottom layer upwards; after all the objective layers are reamed, replacing water in the whole vertical drainage well into clear water; throwing sand to the bottom of the top objective layer; sequentially drilling a horizontal well which is communicated with the cave of each objective layer from the objective layer of the top layer downwards; except for a horizontal well which is connected with the bottom objective layer, after finishing the construction of the horizontal well which is communicated with the cave of each objective layer, collecting sand to the bottom of the cave of the next objective layer; and after finishing the construction of the horizontal well which is communicated with the bottom objective layer, collecting sand to the bottom of an artificial well of the vertical drainage well. The embodiment has the technical schemes of reducing construction cost and shortening a construction period.
Description
Technical field
The present invention relates to the coal-bed gas exploitation field, more particularly, relate in a kind of multi-objective layer geological environment coal bed gas horizontal well and row and adopt the straight well job practices.
Background technology
In the coal-bed gas exploitation field, with what need in the stratum to exploit, the coal seam of output coal bed gas is referred to as destination layer.
At present, horizontal wells coal bed gas, the general mode that adopts are that a row adopts destination layer of straight well exploitation.Concrete, after being drilled with a row and adopting straight well, during lower pipe box, adopt position corresponding with destination layer in the straight well row and be lowered to special pipe box, generally speaking, special pipe box refers to the glass fiber reinforced plastic pipe box; Like this, after well cementation, can cut away glass reinforced plastic sleeve so that destination layer exposes, form the cave thereby can continue to finish reaming hole.Then, be drilled with horizontal well; Creep into finishing the straight well section of horizontal well, inclination section, straight well cave connection, horizontal segment and branch well hole, the drilling well of horizontal well is adopted straight artificial bottom of a well to row and is emptied after finishing, and lower pump draws water, step-down enters row and adopts the stage.
In the prior art, when the geology environment when comprising a plurality of target coal seam, namely, in the stratum of same region, the gas pay that includes a plurality of coal bed gas is in respectively different depth of stratums; At this moment, since will for each target coal seam respectively the row of being drilled with adopt straight well, thereby to repeat construction at the same area, not only to strengthen the workload of construction and the input of construction equipment, and, owing to need building the well site that a plurality of rows adopt straight well, thus the place that has also increased construction, thus cause increase on the cost.
Summary of the invention
In view of this, the embodiment of the invention provides in a kind of multi-objective layer geological environment coal bed gas horizontal well and row to adopt the straight well job practices, to realize the purpose when geology environment minimizing construction volume when comprising a plurality of target coal seam.
The embodiment of the invention is achieved in that
A kind of multi-objective layer geological environment coal bed gas horizontal well and row adopt the straight well job practices, comprise step:
Straight well is adopted by the row of being drilled with, and when being lowered to sleeve pipe, the relevant position of adopting each destination layer in the straight well row is lowered to glass reinforced plastic sleeve, and other position is steel sleeve;
Adopt straight well row, begin upwards successively each destination layer reaming hole to be formed the cave from the destination layer of bottom;
After all destination layer reaming holes were finished, row adopted the full well of straight well and replaces with clear water;
Throw the bottom, cave in the extremely top level goal layer cave of sand;
Begin downwards from the destination layer of top layer, be drilled with successively the horizontal well that is communicated with every layer of destination layer cave, except with horizontal well that the bottom destination layer is communicated with, after the horizontal well construction completion that is communicated with every layer of destination layer cave, implement to drag for sand to the bottom, cave of next destination layer of the destination layer that just has been connected; After the horizontal well construction completion that is communicated with the bottom destination layer, drag for sand to arranging the artificial bottom of a well of adopting straight well.
Preferably, described when being drilled with the horizontal well that is communicated with every layer of destination layer cave in the present embodiment, also comprise:
Except top layer, before being drilled with the horizontal well that is communicated with the destination layer cave and finishing connection, implement to set being lowered to packer with this adjacent steel sleeve place above destination layer; After this horizontal well construction completion, trip out described packer.
Preferably, in the present embodiment, the described horizontal well that is communicated with every layer of destination layer cave that is drilled with comprises:
Except top layer, be communicated with when measuring, in oil pipe pipe string, carry the top, cave that is lowered to this destination layer with being communicated with instrument, the distance of 10-20 rice is arranged between the lower end of described oil pipe pipe string and the top in described cave; After being communicated with the measurement end, described connection instrument being lifted from row from described oil pipe pipe string adopt straight well; Described oil pipe pipe string is lifted from row adopt straight well; Described oil pipe pipe string is lifted from row and is adopted after the straight well, is lowered to packer and implements to set.
Preferably, in the present embodiment, the lower end of described coiled tubing is provided with enlarging.
Preferably, in the present embodiment, the edge of described enlarging also is set to arc transitional type.
Preferably, described when being drilled with the horizontal well that is communicated with every layer of destination layer cave in the present embodiment, comprising:
When the bit drills that is communicated with operation at each destination layer carrying out horizontal well proceeds to and adopts 3 to 5 meters of straight well caves apart from row, stop to creep into, with described connection instrument and described oil pipe pipe string lift from row adopt straight well and be lowered to packer implement to set after, recover to creep into and be communicated with described cave.
Preferably, in the present embodiment, also comprise, drag for husky operation and be lowered to when dragging for the sand instrument, not adopting near each cave is hampered puts down the mode of pounding suddenly.
Can find out from above-mentioned technical scheme, in embodiments of the present invention, adopt in the straight well according to from top to bottom order every layer of destination layer reaming hole row, thereby avoided the reaming hole behind the destination layer of bottom can be because the ickings that drops during other higher destination layer reaming holes hinders the problem of the destination layer of wanting reaming hole.And, in the embodiment of the invention, when being communicated with horizontal well, be communicated with successively every layer of destination layer according to first up and then down order, thus avoid be drilled be drilled with again above the horizontal well horizontal well can probably cause below the blocked problem of well of horizontal well.Pass through said method, the embodiment of the invention has realized adopting in the straight well a plurality of destination layers reaming hole and be communicated with horizontal well respectively a row, the quantity that is drilled with of not only adopting straight well by reducing row has reduced construction cost, has shortened the construction period, but also the place of having reduced construction.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that multi-objective layer geological environment coal bed gas horizontal well described in the embodiment of the invention and row adopt the flow chart of straight well job practices;
Fig. 2 is the another flow chart that multi-objective layer geological environment coal bed gas horizontal well described in the embodiment of the invention and row adopt the straight well job practices;
Fig. 3 is that multi-objective layer geological environment coal bed gas horizontal well described in further embodiment of this invention and row adopt the flow chart of straight well job practices;
Fig. 4 is the another flow chart that multi-objective layer geological environment coal bed gas horizontal well described in the embodiment of the invention and row adopt the straight well job practices.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
In the practice of construction process, for realize when the geology environment when comprising a plurality of coal bed gas gas production layer, reduce the purpose of construction volume, the embodiment of the invention provides in a kind of multi-objective layer geological environment coal bed gas horizontal well and row to adopt the straight well job practices, it is characterized in that, as shown in Figure 1, comprise step:
Straight well is adopted by S11, the row of being drilled with, and when being lowered to sleeve pipe, the relevant position of adopting each destination layer in the straight well row is lowered to glass reinforced plastic sleeve, and other position is steel sleeve;
Geological environment in the embodiment of the invention is the geological environment of multi-objective layer, refers to, and the different depth in the stratum, the gas pay that has respectively a plurality of coal bed gas, described gas pay is destination layer.Concrete, in the embodiment of the invention, take geological environment with three destination layers as example, that is to say at the same area, have three layers of destination layer to be in respectively different depth in the stratum.Wherein the top level goal layer also can be called as the first object layer, and the bottom destination layer also can be called as the 3rd destination layer, and middle destination layer also can be called as the and destination layer.
Adopted by adopting straight well with a row in the embodiment of the invention and to have arranged the scheme of adopting three destination layers; For this reason, row adopts straight well need to run through all destination layers, convenient in order to the destination layer reaming hole time, to cut, when being lowered to sleeve pipe, in the corresponding position of three destination layers, use the sleeve pipe of glass steel material, at other positions, in order to guarantee the support strength to the borehole wall, adopting the material of sleeve pipe is steel.
S12, adopt straight well row, begin upwards successively to each destination layer reaming hole from the destination layer of bottom;
In order to carry out coal bed gas extraction to all destination layers, adopt in the straight well row, reaming hole is carried out in the position of all destination layers form the cave.
In embodiments of the present invention, because row adopts and comprises three destination layers in the straight well, if first with first object layer reaming hole, then when in the second or the 3rd destination layer reaming hole process, can because the first object layer because loosely organized and drop coal cinder or stone, thereby affect the reaming hole of destination layer below this.And in the reaming hole process, the ickings that drops can the row of being deposited in be adopted in the straight well, may cause so following destination layer buried.Thereby impact is to the reaming hole of following destination layer.
For this reason, make progress successively to each destination layer reaming hole since the 3rd destination layer in the embodiment of the invention; That is to say, begin reaming hole from undermost destination layer first, after reaming hole is finished, then to the second adjacent destination layer reaming hole, finish at last the reaming hole to the first object layer.After adopting this scheme, because during each reaming hole, adopt in the straight well row, be arranged with sleeve pipe above the enforcement reaming hole destination layer, implement the phenomenon of reaming hole below the ickings impact so can not cave in or drop, and, because the reaming hole of first destination layer of lower floor being implemented, the ickings that drops only can the row below every layer of cave of implementing reaming hole be adopted in the straight well, is not implementing reaming hole so can not affect.
After S13, all destination layer reaming holes were finished and formed the cave, row adopted the full well of straight well and replaces with clear water;
Behind the reaming hole of having finished all destination layers, row to be adopted straight well clear up, the things that drop such as ickings that row is adopted in the straight well pocket clean out well.
Cleaning finishes, and the employed drilling fluid that has certain viscosity and carry the chip ability during drilling well and the reaming hole is all replaced with clear water.Replacement method is: in replacing the process of clear water, clear water is injected the cavity of drilling tool and adopt the straight well pocket with the row of flowing to, the mud in the pocket returns out the well head that row adopts straight well from drilling tool and the annular space arranged between the pit shaft of adopting straight well.Constantly inject clear water in drilling tool, until mud all returns out well head, row adopted and was full of clear water in the straight well this moment, afterwards drilling tool was tripped out the row of leaving and adopted straight well.
S14, bottom, the extremely top level goal layer cave of throwing sand;
In order to prevent in the follow-up construction, particularly horizontal well and row adopt in the straight well handshaking procedures, and the cave that row adopts in the straight well caves in, and in embodiments of the present invention, can also adopt straight well to row and implement to throw sand, and the position of throwing sand is for arriving bottom the top level goal layer cave.Like this, because row adopts the sand that cave following in the straight well is full of, so avoided in to other destination layer carrying out horizontal well handshaking procedures, the cave that row adopts in the straight well might cave in because of being given a shock.
S15, begin downwards from the first object layer, be drilled with successively the horizontal well that is communicated with every layer of destination layer cave, except with the 3rd layer of horizontal well that destination layer is communicated with, after the horizontal well construction completion that is communicated with every layer of destination layer cave, implement to drag for sand to the bottom, cave of next destination layer of the destination layer that just has been connected; After the 3rd layer of horizontal well construction that destination layer is communicated with completion, drag for sand to arranging the artificial well shaft bottom of adopting straight well.
In embodiments of the present invention, respectively each destination layer is drilled with it the horizontal well that is communicated with, its mode is: at first be drilled with the horizontal well that is communicated with the first object layer, then successively be drilled with the horizontal well that is communicated with every layer of following destination layer.This be because, if be drilled be drilled with again above the horizontal well horizontal well can probably cause below the well of horizontal well stop up.So adopted in embodiments of the present invention the technical scheme that begins successively to be communicated with successively horizontal well from top layer downwards.
Concrete, as shown in Figure 2, can divide following step:
S151, at first is drilled with the horizontal well that is communicated with the first object layer, after horizontal well and row adopt straight well and be communicated with, continues to be drilled with branch horizontal well, and the integral body of finishing horizontal well is drilled with.
S152, adopt straight well row and implement to drag for sand, owing to also will continue the second destination layer is drilled with the horizontal well that is communicated with it, in order to also have sand below the cave that when being drilled with the horizontal well that is communicated with the second destination layer, keeps being connected, so, the position that only need reap sand when dragging for sand is in the bottom, cave that will be connected, that is, the second destination layer is adopted the place, cave of straight well row.
S153, drag for sand after, can be drilled with the horizontal well that is communicated with it to dragging for the destination layer that exposes the cave behind the sand; After the integral body of finishing this horizontal well was drilled with, so far, the horizontal well construction of the second destination layer was complete.Here, described integral body is drilled with the construction that is drilled with of the branch horizontal well that includes this horizontal well.
S154, the bottom, cave of dragging for sand to the three destination layers.Then be drilled with the horizontal well that is communicated with it to dragging for the destination layer that exposes the cave behind the sand; Be drilled with in the integral body of finishing this horizontal well.
S155, after the horizontal well that is communicated with the 3rd layer destination layer is finished integral construction, because the 3rd destination layer is the bottom destination layer, so implement to drag for sand to artificial bottom of a well that row adopts straight well.
Then, can adopt with prior art in similar scheme, be lowered to and drag for husky working string and row is adopted straight well empty; The row of being lowered to adopts tubing string and is undertaken carrying out gas production after draining, the step-down by pump.
So far, the embodiment of the invention has been finished and has been used a row to adopt the construction that is communicated with simultaneously respectively horizontal well in the straight well at three destination layers.
In embodiments of the present invention, when destination layer is two, behind completing steps S153, because the second destination layer bottom destination layer namely, so can implement with that to drag for sand to artificial bottom of a well that row adopts straight well.
In embodiments of the present invention, when destination layer is three when above, step S153 and step S154 above needing to repeat, namely, to after dragging for the destination layer that exposes the cave behind the sand and being drilled with the horizontal well that is communicated with it, then drag for sand to the bottom, cave of next destination layer, finish the horizontal well that is communicated with the destination layer of bottom until be drilled with, namely finish the horizontal well that is communicated with in the destination layer of last one deck.Then can implement to drag for sand to arranging the artificial bottom of a well of adopting straight well to the destination layer of bottom.
The embodiment of the invention is communicated with respectively the technical scheme of horizontal well by a row being adopted a plurality of destination layers in the straight well, the quantity that is drilled with of not only adopting straight well by reducing row has reduced construction cost, shortened the construction period, but also the place of having reduced construction.
In another embodiment of the present invention, wherein said when being drilled with the horizontal well that is communicated with every layer of destination layer cave with above-described embodiment step basic simlarity, also comprise:
Except top layer, when the horizontal well inclination section is adopted straight well cave apart from 3-5 rice with row and be communicated with instrument and lift from row and adopt straight well, be lowered to this adjacent steel sleeve place above destination layer cave that packer implements to set to realize the horizontal well finished and the isolation of destination layer horizontal well to be crept into below it, after this horizontal well construction completion, trip out described packer.
Concrete, as shown in Figure 3, the embodiment of the invention comprises following step:
Straight well is adopted by S21, the row of being drilled with, and when being lowered to sleeve pipe, the relevant position of adopting each destination layer in the straight well row is lowered to glass reinforced plastic sleeve, and other position is steel sleeve;
S22, adopt straight well row, begin upwards successively to each destination layer reaming hole from the destination layer of bottom;
After S23, all destination layer reaming holes were finished, row adopted the full well of straight well and replaces with clear water;
S24, bottom, the extremely top level goal layer cave of throwing sand;
S25, begin downwards from the destination layer of top layer, be drilled with successively the horizontal well that is communicated with every layer of destination layer cave, except with horizontal well that the bottom destination layer is communicated with, after the horizontal well construction completion that is communicated with every layer of destination layer cave, implement to drag for sand to the bottom, cave of next destination layer; Except top layer, being communicated with instrument when the horizontal well inclination section is adopted straight well cave apart from 3-5 rice with row lifts from row and adopts straight well, described oil pipe pipe string lift from row adopt straight well after, be lowered to this adjacent steel sleeve place above destination layer cave that packer implements to set to realize the horizontal well finished and the isolation of destination layer horizontal well to be crept into below it, after this horizontal well construction completion, trip out described packer; After the horizontal well construction completion that is communicated with the bottom destination layer, drag for sand to arranging the artificial bottom of a well of adopting straight well.
Wherein, step S21 step S11 to step S24 and the upper embodiment is basic identical to step S14, just repeats no more at this; Different from a upper embodiment is in the step 25, to have increased the sport technique segment that uses packer in embodiments of the present invention; What as shown in Figure 4, step 25 specifically comprised is step by step:
S251, be drilled with the horizontal well that is communicated with the first object layer, after horizontal well and row adopt straight well and be communicated with, continue to be drilled with branch horizontal well, thereby the integral body of finishing horizontal well be drilled with.
S252, adopt straight well row and implement to drag for sand, owing to also will continue the second destination layer is drilled with the horizontal well that is communicated with it, in order to also have sand below the cave that when being drilled with horizontal well that next destination layer is communicated with, keeps being connected, so the position that only need reap sand when dragging for sand is in the bottom, cave that will be connected and gets final product.
S253, drag for sand after, the upper steel sleeve place in the cave of exposing after dragging for sand namely on the inwall of first object layer and the second destination layer steel sleeve between only, is lowered to packer according to aforementioned construction sequence in good time;
By being lowered to packer, thereby so that be communicated with the construction point of operation at follow-up horizontal well isolated with the destination layer connectivity points of last layer, thereby avoided being communicated with the impact that is subject to the foreign material such as coal cinder that drop from the upper strata connectivity points in constructing in lower floor.Also avoided the obstruction to the horizontal well well that has formed.
S254, be drilled with the horizontal well that is communicated with it to dragging for the destination layer that exposes the cave behind the sand; After the integral body of finishing this horizontal well was drilled with, so far, the horizontal well construction of the second destination layer was complete.Here, described integral body is drilled with the construction that is drilled with of the branch horizontal well that includes this horizontal well.
S255, after the integral body of finishing this horizontal well is drilled with, the packer that is lowered to is tripped out, then, row is adopted straight well implements to drag for sand, here, the position of dragging for sand is still to the bottom, cave of the 3rd destination layer;
256, drag for sand after, the upper steel sleeve place in the cave of exposing after dragging for sand namely on the inwall of the steel sleeve between the second destination layer and the 3rd destination layer, is lowered to packer according to aforementioned construction sequence in good time;
257, be drilled with the horizontal well that is communicated with it to dragging for the destination layer that exposes the cave behind the sand; After the integral body of finishing this horizontal well was drilled with, so far, the horizontal well construction of the 3rd destination layer was complete.
S258, after the horizontal well that is communicated with the 3rd layer destination layer is finished integral construction, because the 3rd destination layer is the bottom destination layer, so implement to drag for sand to artificial bottom of a well that row adopts straight well.
Then, can adopt with prior art in similar scheme, be lowered to working string and row is adopted straight well clean; The row of being lowered to adopts tubing string and is undertaken carrying out gas production after draining, the step-down by pump.
So far, the embodiment of the invention has been finished and has been used a row to adopt the construction that is communicated with simultaneously respectively horizontal well in the straight well at a plurality of destination layers.
When being drilled with horizontal well, generally all need be communicated with instrument be placed on row adopt connectivity points in the straight well near.In embodiments of the present invention, need to adopt destination layers different in the straight well same row connectivity points is set respectively, owing to adopting row a plurality of caves are arranged in the straight well, like this, when being communicated with the first object layer, be communicated with the top that instrument can be placed on first object layer cave, at this moment, be communicated with instrument and can be lowered to easily and take out according to known technique.But, when connectivity points is the second destination layer or following destination layer, need to be communicated with instrument by the cave of the destination layer of connectivity points top, in this case, be communicated with that instrument is very possible to be adopted edge in the straight well with the cave row and bump and scratch or block, thus normally being lowered to and taking out of impact connection instrument.
For this reason, in the embodiment of the invention, before being lowered to the connection instrument, row adopts and is lowered to oil pipe pipe string in the straight well to desired location, then will be communicated with instrument and be communicated with instrument to the top, cave from being lowered in the pipeline of oil pipe.
Generally speaking, being drilled with in the process of horizontal well, when drill bit when being communicated with 3 to 5 meters in instrument, just can take out the connection instrument.In actual applications, for fear of producing magnetic disturbance to being communicated with instrument, also will maintain a certain distance between the implantation site under the lower end of oil pipe pipe string and the instrument, in the embodiment of the invention, this segment distance can be 10-20 rice.
Preferably, in embodiments of the present invention, the lower end of described oil pipe pipe string can also be provided with enlarging, is communicated with instrument when taking out by coiled tubing thereby make, and can convenient withdrawal enter in the described oil pipe.For the continuous oil pipe that is provided with enlarging can be lowered to from sleeve pipe and take out smoothly, in embodiments of the present invention, the edge of described enlarging can also be for being set to arc transitional type.
In above-mentioned all embodiment, be lowered to when dragging for the sand instrument, the well section does not adopt to be hampered and suddenly puts down the mode of pounding near the cave.
Because in embodiments of the present invention, when implementing to drag for sand, be lowered to and drag for the sand instrument and need to pass through the cave, because the geologic structure in cave is exposed row and adopted in the straight well, and is stable not comparatively speaking, causes for fear of violent collision and collapse, so can not adopt is hampered puts down the mode of pounding suddenly.Thereby the safety that straight well is adopted by the row of assurance.
Each embodiment adopts the mode of going forward one by one to describe in this manual, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, in other embodiments realization.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a multi-objective layer geological environment coal bed gas horizontal well and row adopt the straight well job practices, it is characterized in that, comprise step:
Straight well is adopted by the row of being drilled with, and is lowered to two when driving sleeve pipe, and the relevant position of adopting each destination layer in the straight well row is lowered to glass reinforced plastic sleeve, and other position is steel sleeve;
Adopt straight well row, begin upwards successively each destination layer reaming hole to be formed the cave from the destination layer of bottom;
After all destination layer reaming holes formed the cave, row adopted the full well of straight well and replaces with clear water;
Throw the bottom, cave in the extremely top level goal layer cave of sand;
Begin downwards from the destination layer of top layer, be drilled with successively the horizontal well that is communicated with every layer of destination layer cave, except with horizontal well that the bottom destination layer is communicated with, after the horizontal well construction completion that is communicated with every layer of destination layer cave, implement to drag for sand to the bottom, cave of next destination layer of the destination layer that just has been connected; After the horizontal well construction completion that is communicated with the bottom destination layer, drag for sand to arranging the artificial bottom of a well of adopting straight well.
2. described method according to claim 1 is characterized in that, and is described when being drilled with the horizontal well that is communicated with every layer of destination layer cave, also comprises:
Except top layer, before being drilled with the horizontal well that is communicated with the destination layer cave and finishing connection, implement to set being lowered to packer with this adjacent steel sleeve place above destination layer; After this horizontal well construction completion, trip out described packer.
3. described method according to claim 2 is characterized in that, the described horizontal well that is communicated with every layer of destination layer cave that is drilled with comprises:
Except top layer, be communicated with when measuring, in oil pipe pipe string, carry the top, cave that is lowered to this destination layer with being communicated with instrument, the distance of 10-20 rice is arranged between the lower end of described oil pipe pipe string and the top in described cave; After being communicated with the measurement end, described connection instrument being lifted from row from described oil pipe pipe string adopt straight well; Described oil pipe pipe string is lifted from row adopt straight well; Described oil pipe pipe string is lifted from row and is adopted after the straight well, is lowered to packer and implements to set.
4. described method according to claim 3 is characterized in that, the lower end of coiled tubing is provided with enlarging.
5. described method according to claim 4 is characterized in that, the edge of described enlarging is set to arc transitional type.
6. described method according to claim 4 is characterized in that, and is described when being drilled with the horizontal well that is communicated with every layer of destination layer cave, comprising:
When the bit drills that is communicated with operation at each destination layer carrying out horizontal well proceeds to and adopts 3 to 5 meters of straight well caves apart from row, stop to creep into, with described connection instrument and described oil pipe pipe string lift from row adopt straight well and be lowered to packer implement to set after, recover to creep into and be communicated with described cave.
7. described method according to claim 6 is characterized in that, also comprises, drags for the sand operation and is lowered to when dragging for the sand instrument, avoids being hampered suddenly putting down near each cave and pounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010286268 CN101975050B (en) | 2010-09-17 | 2010-09-17 | Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010286268 CN101975050B (en) | 2010-09-17 | 2010-09-17 | Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101975050A CN101975050A (en) | 2011-02-16 |
| CN101975050B true CN101975050B (en) | 2013-03-06 |
Family
ID=43574955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010286268 Active CN101975050B (en) | 2010-09-17 | 2010-09-17 | Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101975050B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182403B (en) * | 2011-04-28 | 2016-06-29 | 王萍萍 | Drilling type well completion technology for fishbone branch borehole |
| CN102400664B (en) * | 2011-09-03 | 2012-12-26 | 中煤科工集团西安研究院 | Well completion process method for increasing gas production of ground horizontally butted well of soft coal stratum |
| CN102493790A (en) * | 2011-12-27 | 2012-06-13 | 北京奥瑞安能源技术开发有限公司 | Method for increasing yield of coal bed gas |
| CN103075113B (en) * | 2013-01-15 | 2015-09-09 | 江阴市星宇塑胶有限公司 | A kind of processing method of coal bed gas trap tube |
| CN104165030B (en) * | 2013-06-20 | 2017-05-03 | 中国矿业大学(北京) | Glass fiber reinforced plastic casing pipe string manufacturing process of ground coal-bed gas well |
| CN109798078B (en) * | 2019-03-06 | 2020-08-11 | 中联煤层气有限责任公司 | Coal bed gas horizontal well cave sand-buried well repairing process |
| CN112593910B (en) * | 2020-12-10 | 2022-11-11 | 山西晋城无烟煤矿业集团有限责任公司 | Efficient mining method for broken low-permeability coal bed gas short horizontal well group |
| CN114278220B (en) * | 2021-12-31 | 2022-12-20 | 北京派创石油技术服务有限公司 | Coal powder layer drilling method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270277A (en) * | 2008-04-30 | 2008-09-24 | 中国石油天然气股份有限公司 | Horizontal well segmenting perforating compression fracture technique and rubber plug of self-breaking glue solution bung |
| CN101818620A (en) * | 2010-04-26 | 2010-09-01 | 徐萍 | Mining method for maximum reservoir contact well and maximum reservoir contact well structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070187093A1 (en) * | 2006-02-15 | 2007-08-16 | Pfefferle William C | Method for recovery of stranded oil |
-
2010
- 2010-09-17 CN CN 201010286268 patent/CN101975050B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270277A (en) * | 2008-04-30 | 2008-09-24 | 中国石油天然气股份有限公司 | Horizontal well segmenting perforating compression fracture technique and rubber plug of self-breaking glue solution bung |
| CN101818620A (en) * | 2010-04-26 | 2010-09-01 | 徐萍 | Mining method for maximum reservoir contact well and maximum reservoir contact well structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101975050A (en) | 2011-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101975050B (en) | Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment | |
| CN101994505B (en) | Drilling construction method by cooperation of horizontal wells and extraction straight wells for coal bed methane in multiple objective layers | |
| CN102979498B (en) | A kind of multi-lateral horizontal well system for coal bed gas | |
| CN102080530B (en) | Method for constructing horizontal coal bed gas well and vertical drainage and mining well | |
| CN100412314C (en) | Process for gas collection by a well with one mouth and multiple branches drilled along coal layer | |
| AU2011259819B2 (en) | Mine dewatering system and method | |
| CN104481495A (en) | Coalbed methane (CBM) cluster double multi-branch horizontal well and drilling method relative to discharging and mining vertical well system | |
| CN102493790A (en) | Method for increasing yield of coal bed gas | |
| CN109339080A (en) | A kind of open-cut foundation ditch deep slob region vacuum precipitation system and construction method | |
| CN104947690A (en) | Grooving construction method for embedding underground continuous wall into rock | |
| CN112855087A (en) | Coal bed gas horizontal well system transformation method | |
| CN102226396A (en) | Non-explosive mining method by excavation, artificial group-column reconstruction, long-hole caving and subsequent filling | |
| CN108086957A (en) | A kind of method of the U-shaped coal bed gas well construction in double coal seams | |
| CN106640018A (en) | Method for mining coalbed gas through V-shaped well set | |
| CN102094580A (en) | Coal engineering hole directional drilling method | |
| CN102966094B (en) | Method for constructing concrete pile through rotary excavating and pressure irrigation | |
| Zhu et al. | Main technical innovations of Songke well No. 2 drilling project | |
| CN101979816A (en) | Coal bed gas horizontal well and drainage-mining straight well combined well drilling construction method | |
| CN1317483C (en) | Method of entering target geologic body and system | |
| CN204299468U (en) | A kind of positioning and guiding system and device of hidden hole drilling boring | |
| CN106930733A (en) | Coal bed gas group wells extraction system and method for construction | |
| CN101956548B (en) | Coal bed methane multi-branch horizontal well system and modification method thereof | |
| Amina et al. | Analysis of stuck pipe incidents in khabaz field | |
| CN116220546A (en) | Construction method for combining super-thick hard rock condition large-diameter long piles into holes | |
| CN114607318A (en) | Fracturing cooperative construction method for combined production and drilling of multi-layer horizontal well for deep coal bed methane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment Effective date of registration: 20150925 Granted publication date: 20130306 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: Beijing Aoruian Energy Source Tech. & Dev. Co., Ltd. Registration number: 2015990000827 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190117 Granted publication date: 20130306 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: Beijing Aoruian Energy Source Tech. & Dev. Co., Ltd. Registration number: 2015990000827 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |